Just stumbled upon this picture.
Source:
http://www.museevirtuel-virtualmuseum.ca
It's dated: "20th Century 1939 -1945", not very specific. But, this picture seems to be show the same vehicle and is dated 1943
Source:
http://www.museevirtuel-virtualmuseum.ca
Interesting......looks like a Ford cab13, but picture taken at the General Motors plant in Oshawa according to the description.